<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      body {
        position: relative;
        -webkit-box-align: center;
        -ms-flex-align: center;
        align-items: center;
        min-height: 100vh;
        background-color: #76daff;
        overflow: hidden;
      }

      body:before,
      body:after {
        content: '';
        position: absolute;
        left: 50%;
        min-width: 300vw;
        min-height: 300vw;
        background-color: #fff;
        -webkit-animation-name: rotate;
        animation-name: rotate;
        -webkit-animation-iteration-count: infinite;
        animation-iteration-count: infinite;
        -webkit-animation-timing-function: linear;
        animation-timing-function: linear;
      }

      body:before {
        bottom: 15vh;
        border-radius: 45%;
        -webkit-animation-duration: 10s;
        animation-duration: 10s;
      }

      body:after {
        bottom: 12vh;
        opacity: 0.5;
        border-radius: 47%;
        -webkit-animation-duration: 10s;
        animation-duration: 10s;
      }

      @-webkit-keyframes rotate {
        0% {
          -webkit-transform: translate(-50%, 0) rotate(0deg);
          transform: translate(-50%, 0) rotate(0deg);
        }
        50% {
          -webkit-transform: translate(-50%, -2%) rotate(180deg);
          transform: translate(-50%, -2%) rotate(180deg);
        }
        100% {
          -webkit-transform: translate(-50%, 0%) rotate(360deg);
          transform: translate(-50%, 0%) rotate(360deg);
        }
      }

      @keyframes rotate {
        0% {
          -webkit-transform: translate(-50%, 0) rotate(0deg);
          transform: translate(-50%, 0) rotate(0deg);
        }
        50% {
          -webkit-transform: translate(-50%, -2%) rotate(180deg);
          transform: translate(-50%, -2%) rotate(180deg);
        }
        100% {
          -webkit-transform: translate(-50%, 0%) rotate(360deg);
          transform: translate(-50%, 0%) rotate(360deg);
        }
      }
    </style>
  </head>
  <body></body>
</html>
